YR 11 PHYSICS - UNIT 1
LIGHT TEST (1)
NAME: ......
Answer all questions in the spaces provided unless instructed to use graph paper. Circle the most correct response in both the True or False and the Multiple Choice questions. Marks are as indicated.
1. A material that allows light to pass through it without significant distortion is known as: (1 mark)
A. translucent B. opaque C. luminous D. transparent
2. Light incident on the surface of a material can be partly reflected, partly ...... and partly absorbed. (1 mark)
3. During a total solar eclipse a region of earth is darkened by the shadow of the moon. T or F
4. Light travels in straight lines. Provide a specific example and explain how it supports the theory. A diagram must be included with your explanation. (2 marks)
5. The image produced by a pinhole camera is (1 mark)
A. upright, virtual, diminished
B. upright, real, diminished
C. inverted, virtual, diminished
D. inverted, real, diminished
6. Explain the difference between regular and diffuse reflection. You must include appropriate labelled diagrams. (2 marks)
7. In diffuse reflection, the angle of incidence equals the angle of reflection. True or False (1 mark)
8. Locate the image of the following object by drawing rays from the object reflecting off the mirror and into the eye (2 marks)
9. A girl 1.50 m tall wishes to see her entire image in a plane mirror. She wants to know the minimum height that the mirror must be and how high she must place it on the wall to meet the requirements. Her eyes are 0.10 m below the top of her head. Calculate the size of the mirror needed and the position it must be placed and then draw a diagram to illustrate the situation. (2 marks)
10. A boy looks into a concave mirror placed 10 cm in front of his face. The focal length of the mirror is 25cm. His image will be (1 mark)
A. Real, upright, magnified
B. Real, inverted, magnified
C. Real, inverted, diminished
D. Virtual, upright, magnified
E. Virtual, upright, diminished
11. Use the graph paper provided to construct an accurate scale diagram to determine the position, nature and magnification of an 3.0 cm object placed 25 cm from a concave mirror of focal length 15 cm (5 marks).
12. Use the mirror formula to find the position, nature and magnification of an object 4.0 cm high placed 15 cm from a concave mirror of radius of curvature 60 cm. (4 marks)
13. Use the graph paper provided to construct an accurate scale diagram to determine the position, nature and magnification of an 6.0 cm object placed 30 cm from a convex mirror of focal length 15 cm (5 marks).
14. An object is placed 20 cm from a concave mirror and produces an real image 40 cm in front of the mirror. Use graph paper or the mirror formula to determine the i) focal length and ii) the magnification ( 2+2 = 4 marks)
15. The failure of a concave spherical mirror to focus to an exact point is called spherical ...... ………......
You can use a ...... mirror to overcome this problem. (2 marks)
9/19/00 - Light Test 1.doc